"Trentatré Trentini entrarono a Trento tutti e trentatré trotterellando" is a very popular Italian tongue twister...it reminds me that when I was a child I used to play with it, but my friends were always making fun of me because I couldn't say it properly as I cannnot roll the "r" like Italians do as I am half French...So I have mixed feelings about this tongue twister full of "rs"!